crater: Callisto

A heavily cratered region near Callisto’s equator, in an image taken by the Galileo spacecraft on June 25, 1997. North is to the top. The old, double-ringed crater near the centre, named Har, is 50 km (30 miles) across. It has a prominent younger crater about 20 km (12 miles) across superposed on its western rim, and it is crosscut by streaklike chains of secondary craters formed from material ejected by the impact that produced the large crater partly visible in the upper right corner.